Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Numerical simulation of air-solid thermal storage for CSP systems
Submission Author:
Claudio Adasme , DF
Co-Authors:
Taygoara Oliveira, Antonio Brasil Junior, Mario Benjamim Baptista de Siqueira, Claudio Adasme
Presenter: Claudio Adasme
doi://10.26678/ABCM.COBEM2017.COB17-5912
Abstract
This work presents the results of a numerical modeling of a porous ceramic honeycomb for sensible thermal energy storage. An air-solid two equation lumped model for a porous medium, which considers convection and conduction heat transfer, is formulated and solved numerically. In order to obtain the convective heat transfer coefficient, several 3D simulations in Star-ccm+ are performed, and an empirical Nusselt Reynolds correlation is proposed for a single honeycomb channel. The correlation is evaluated in the model locally considering variable thermo-physical properties for the heat transfer fluid in order to obtain the convective coefficient. Then, the resultant coefficient is extrapolated for the entire honeycomb matrix and validated through a CFD simulation of a thermal loading cycle. The numerical model results show a good agreement with the CFD simulation for the fluid temperature and the amount of the energy stored by the solid.
Keywords
ceramic honeycomb, Thermal Storage, Porous media, sensible heat, CSP
